[Bug math/6794] ilogb() does not raise exceptions or set errno on domain errors

["mtk dot manpages at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 09:48 -------
Created an attachment (id=2856)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2856&action=view)
test program

Sample runs demonstrating problem.  In no case is errno set.  For the Inf and
-Inf cases, no exception is raised.

$ /tmp/mt_ilogb 0
errno == 0
fetestexcept() says:  FE_INVALID FE_DIVBYZERO
ilogb(0.00000000000000000e+00)=-2147483648
0 FE_DIVBYZERO normal

$ /tmp/mt_ilogb nan
errno == 0
fetestexcept() says:  FE_INVALID
ilogb(nan)=-2147483648
0 FE_INVALID normal

$ /tmp/mt_ilogb inf
errno == 0
fetestexcept() says:
ilogb(inf)=2147483647
0 0 normal

$ /tmp/mt_ilogb -- -inf
errno == 0
fetestexcept() says:
ilogb(-inf)=2147483647
0 0 normal


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6794

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